402 CALIFORNIA ACADEMY OF SCIENCES  [Proc. 41H Srr. 
once. The average for the eighty thighs is 11.51. In forty 
specimens from Pima and Cochise counties the number varies 
from nine to thirteen; being 9 once, 10 eight times, 11 thirty 
times, 12 thirty-one times, and 13 ten times. The average for 
the eighty thighs is 12.12. 
In Yuma specimens the color in life in both sexes varies on 
the upper surfaces from light clay to blackish brown. Most 
males show the blackish collar and dorsal blotches much more 
clearly than females. Males have a blue area on each side of 
the belly, absent in nineteen females. One large male had deep 
“iron rust” orange covering the entire throat and chin. A 
smaller male had similar coloring of the throat but with a 
bright turquoise blue central patch. Five large and two 
medium-sized males had throats bluish yellow, varying, with- 
out respect to size, from nearly clear blue to faintly bluish 
lemon yellow. One large and one small male had clear lemon 
yellow throats. One moderately large male had the throat 
gray without blue or yellow or orange. Nineteen females had 
no blue on the throat or sides of belly. Eight females had 
orange-colored, and eight had lemon-colored, throats; while 
one large and one small female had the throat orange with 
lemon center. 
The coloring of living specimens from Tucson shows a 
similar variation. Females have no blue on belly. Males have. 
The blue of the throat varies from clear turquoise to the green- 
blue of old turquoises. The throat is blue in thirteen males; 
orange in eight females; clear yellow in three males and six 
females; orange with yellow center in seven males; orange 
- with blue center in eight males; orange with green center in 
one male; and plain gray in one female. These color notes 
were all made in March, 1912. 
At Yuma, these lizards are very common on trees and 
wooden bridges. At Tucson, we found them on trees, fences, 
and piles of stones. 
24.—Uta graciosa (Hallowell) 
This species still remains rare in collections. We secured 
only eight specimens, all at Yuma, in Sept. 1911, and March 
11-21, 1912. These are Nos. 20722 and 33643 to 33649. 
Their femoral pores range from nine to twelve; being 9 once, 
